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[core] Repeated append-only compaction retains intermediate files - #10448
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JingsongLi merged 1 commit intoOct 9, 2026
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taoran92
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Clean up intermediate compaction outputs while preserving files already handed to a committer.
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Purpose
Closes #10447.
Repeated append-only compaction before
prepareCommitretains intermediate files in bothcompactBeforeandcompactAfter. For example,A + B + C -> Xfollowed byX + D + E -> Yemits both DELETE and ADD entries forX, which can fail manifest merging.Track pending compaction files by file name and remove outputs consumed by a later compaction from the pending results. Delete those intermediate data files and their extra files, while preserving files already handed to a committer by an earlier
prepareCommit.Tests
Added
AppendOnlyWriterTest#testRepeatedCompaction, covering repeated compaction with and without an interveningprepareCommit. It checks the compaction increments, intermediate data and extra-file cleanup, preservation of files handed to a committer, and manifest merging to the final output.